You have to manually change your account settings on the Nintendo website, I think. Formatting a Switch doesn't change that your account is only primary on that Switch.
The only time you need to be online to play a digital game is if you're playing it as a guest/secondary account on a different Switch than usual. In that case, it's just to make sure the account playing it actually belongs to the person who bought the game.
This stops you from signing on to...
I don't really have a favourite flower type independent of colour, so this is a bit difficult...
I really like black and purple roses, pink lilies, and black cosmos. Purple tulips are also really nice. I'm not so much a fan of windflowers or mums in general, but hyacinths are okay.
I can pay in NMT, Gold Nuggets, or Star Fragments.
I can also trade for:
Black Drink Machine (on hand)
Black Snack Machine (on hand)
Black Telephone Box (on hand)
Blue Snack Machine
White & Black Public Bench
Black Park Clock
Not sure if this is the same one they use, but I've gotten good results from this one.
https://docs.google.com/document/d/1ARIQCUc5YVEd01D7jtJT9EEJF45m07NXhAm4fOpNvCs